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Intelligent infusion monitor control method for accurately controlling dripping speed based on stepping motor

A stepping motor, precise control technology, applied in the direction of non-electric variable control, flow control, flow monitor, etc., can solve the problems of low adjustment accuracy, large error of gravity infusion pump, and can not be applied, so as to filter out environmental interference , Accurate speed measurement, rapid speed adjustment process

Pending Publication Date: 2021-12-31
NANJING MAODU NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing infusion pumps use photoelectric or gravity to detect liquids. Photoelectric infusion pumps have high power consumption and cannot be applied to occasions that need to be protected from light, while gravity infusion pumps have large errors and cannot monitor the state of droplets. , and mostly use DC motors to clamp or release the infusion tube, the adjustment accuracy is low, the exact position of the slider cannot be grasped, and it is impossible to adjust flexibly and quickly according to the current drip speed

Method used

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  • Intelligent infusion monitor control method for accurately controlling dripping speed based on stepping motor
  • Intelligent infusion monitor control method for accurately controlling dripping speed based on stepping motor
  • Intelligent infusion monitor control method for accurately controlling dripping speed based on stepping motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] like figure 1 As shown, a control method of an intelligent infusion monitor based on a stepping motor to accurately control the drip speed includes the following steps:

[0062] Step 1: Set the target drip rate of the intelligent infusion monitor;

[0063] Step 2: Obtain the current drip rate of the intelligent infusion monitor, and calculate the basic value of the adjustment ratio based on the difference between the current drip rate of the intelligent infusion monitor and the target drip rate;

[0064] Step 3: Based on the target drip rate value of the intelligent infusion monitor, adjust the basic value of the adjustment ratio to form a revised adjustment ratio;

[0065] Step 4: Based on the current drip speed of the intelligent infusion monitor, set the basic value of the number of adjustment steps of the stepper motor;

[0066] Step 5: The stepper motor adjusts the number of steps of the stepper motor based on the basic value of the number of adjustment steps and...

Embodiment 2

[0091] The difference between embodiment 2 and embodiment 1 is only that: the current drip speed is calculated by weighting and removing extreme values, and the influence of extreme values ​​and water droplet stickiness is deducted.

[0092] Concrete, preferably, the calculation of current drop rate in step 2 comprises the following steps:

[0093] Step 2.1: Weighted calculation of the weighted velocity of each drop,

[0094] S wi = ω i S i +ω i-1 S i-1 +…+ω i-a+1 S i-a+1 (1)

[0095] Among them, S wi Indicates the weighted velocity of the i-th drop, S i Indicates the drop speed of the i-th drop, which is closest to the current moment, ω i Indicates the weighted weight of the i-th drop, a is the number of weighted drop speeds, which is a constant, a≥3,

[0096] Weights satisfy the following conditions:

[0097] ω i +ω i-1 +…+ω i-a+1 = 1 (2)

[0098] ω i > ω i-1 >…>ω i-a+1

[0099] preferred, ω i =(a-1) / a.

[0100] Step 2.2: Remove extreme dripping speeds...

Embodiment 3

[0107] The difference between embodiment 3 and embodiment 1 is only that: the droplet is detected by the capacitive sensor, and the time between two drops is recorded, so that the current dripping speed can be obtained, based on the difference between the current speed and the target speed, the calculation Need to advance the distance, and then drive the stepper motor to push the slider to a precise position.

[0108] Specifically, the intelligent infusion monitor includes a monitor body 9, the front of the monitor body 9 is provided with a cavity 3 for accommodating the dripping funnel 2 of the infusion tube 1, and the monitor body 9 is located on the The top and bottom of the cavity 3 are respectively provided with holes 4 for the dripping funnel 2 to pass through freely. On the monitor body 9 and at the middle and upper position of the cavity 3, a capacitive sensor 5 is provided. The capacitive sensor 5. Record the real-time capacitance value in the horizontal direction of ...

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Abstract

The invention provides an intelligent infusion monitor control method for accurately controlling the dripping speed based on a stepping motor. The intelligent infusion monitor control method comprises the following steps of: S1, setting a target dripping speed of an intelligent infusion monitor; S2, acquiring a current dripping speed of the intelligent infusion monitor, and calculating an adjustment proportion basic value; S3, adjusting the adjustment proportion basic value to form a corrected adjustment proportion; S4, setting an adjustment step number basic value of the stepping motor; S5, adjusting the step number of the stepping motor, and then adjusting the clamping state of the intelligent infusion monitor; and S6, judging whether the difference between the current dripping speed and the target dripping speed falls within an allowable error range, if yes, stopping adjustment, otherwise, carrying out fine adjustment until the difference is controlled within the allowable range. According to the invention, a sliding block is controlled to move forwards and backwards through adopting the stepping motor and designing a corresponding algorithm in a matched mode, the precision is high, and the intelligent infusion monitor control method is flexible, convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of infusion monitors, in particular to a control method for an intelligent infusion monitor based on stepping motors to precisely control drip speed. Background technique [0002] Intravenous infusion is a common way of administration in clinical treatment. According to the nature of the drug and the constitution of the patient, the speed of intravenous infusion is also different. If the infusion is too fast or too slow, it is difficult to achieve the expected therapeutic effect, and even affect the safety of nursing. At present, the common infusion set widely used clinically mainly relies on the pressure of the liquid level difference to infuse liquid into the recipient, and relies on the nursing staff to observe with the naked eye and manually adjust the wheel clamp to control the infusion speed. Ordinary infusion sets lack functions such as blockage alarm, bubble alarm, and liquid infusion alarm, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/142A61M5/168A61M5/172
CPCA61M5/142A61M5/1689A61M5/16877
Inventor 吴西明安康钱兆俊沈舫涛万子禹朱靖亮
Owner NANJING MAODU NETWORK TECH CO LTD
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